Table 3
Kinematical properties of HE 0017+0055, for different hypotheses about its absolute visual magnitude MV and, hence, distance, adopting the Tycho-2 proper motion and a V magnitude of 11.65 (Høg et al. 2000, in agreement with the ASAS-3 data; see Fig. 3).
| Teff | log g | L | MV | d | | z | | V α ∗ | V δ | U | V | W | Lum. class | Model |
| (K) | (L⊙) | (kpc) | (kpc) | (km s-1) | (km s-1) | (km s-1) | (km s-1) | (km s-1) | ||||
|
|
||||||||||||
| 4185 | 0.18 | 4470 | −4.1 | 14 | 12.2 | 458 ± 179 | 942 ± 166 | 68 | –956 | –433 | II | PADOVA |
| 3950 | 0.5 | 1920 | −3.2 | 9.3 | 8.1 | 305 ± 119 | 628 ± 111 | 49 | –647 | –264 | II | STAREVOL |
| 4000 | 1.0 | 523 | −1.8 | 4.8 | 4.2 | 157 ± 69 | 296 ± 64 | 29 | –348 | –110 | III | STAREVOL |
| 3950 | 4.9 | 0.03 | 8.8 | 0.037 | 0.032 | 1.2 ± 0.5 | 0.15 ± 0.03 | 12 | –40 | 68 | V | STAREVOL |
Notes. The uncertainties on the space motion originate from the uncertainties on the Tycho-2 proper motion. The correspondence between MV and log g is from the STAREVOL track (see Sect. 5) for a 0.9 M⊙ star with [Fe/H] = −2.4, [C/H] = −0.7, and C/O = 20, adopting a bolometric correction of 0.3. The first line corresponds, however, to the Padova track used by Kennedy et al. (2011). U,V,W are the heliocentric velocity components along the Galactic coordinate system (U is positive in the direction of the Galactic centre, and V is positive in the direction of Galactic rotation l = + 90°). Vα ∗ and Vδ are the space velocities along the direction of right ascension and declination, respectively.
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